The diaphragm in the diagram below is a muscle that contracts during inhalation. thus option A is correct option.
<h3>What is the role of the diaphragm?</h3>
The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily.
Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.
Learn more about the diaphragm here:
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Answer:
C] 10,000 years
Explanation:
It usually takes a million or more years. The longer, the more identifiable.
Answer:
real subtances? look around you and you'll find out
Explanation:
Nerves - transmit impulse of sensation to brain or spinal cord, then to muscles and organs
The cramps can be caused due to anaerobic respiration in the muscles and lactic acid formation.
During intense physical activity the muscles become deprived of oxygen, in this condition, anaerobic respiration takes place in the muscle cells causes the formation of the lactic acid.
The physical training increases the strength of the muscles, which can help the muscles not to get tired easily. that is why, physical training is required before any marathon.
